Super Best Audio Friends
The evolution of the original irreverent and irrelevant and non-authoritative site for headphone measurements, i.e. frequency response graphs, CSD waterfall plots, subjective gear reviews. Too objective for subjectivists; too subjective for objectivists
These remind me a lot more of the HP1000 I heard years ago than they do the SR60s I owned even more years ago (many more years). They are brighter and more aggressive than the HP1000. Less dark and warm overall. But they have more of the sense of refinement I remember from those, whereas the SR60s were grating and rough.
A few things are important to note when considering buying a ZMF. All of them have some degree of ZMF-ness; varying degrees of coloration of timbre, richness in harmonics, and cup resonance play (yes, even the open models have this. Look at the CSD measurements on this site). Also, all ZMFs can be tuned to some extent by rolling some pads; that and the differences that wood makes will be discussed later on below. Thus, the notes here will be general notes on the headphone as a whole, not comprehensive on what is possible by rolling pads to taste.
Pics or it didn't happen:
Grado is in no danger of disappearing, but it's about time we revisit a classic, learn why it was so special in the first place, and tweak it to get the best out of it. I present the Grado RS2.
I'll be brief. This DAC pushes the boundaries of possibility.
Ultra low distortion
Power supply noise spectrum are at or below -140 dBFS in balanced output
Balanced output Dynamic Range of 140 dB
Balanced output Cross-talk is dual mono with > 150 dB isolation
Balanced output Gain Linearity is nearly perfect to -120 dBFS, less than ± 1 dB to -130 dBFS
Exceptionally low jitter; PLL has high jitter rejection of 80 dB.
NOS square wave is near perfect with fast slew rate and, of course, no filter ringing
Single Ended performance is somewhat less than Balanced output, as is typical
Single Ended performance is still exceptional compared to other DAC SE outputs
Well done Jeff Zhu!
FIRST IMPRESSIONS (SOUND): https://www.superbestaudiofriends.o...nic-studios-oblivion-review.8925/#post-289155
I ordered the optional speaker taps (this amp doesn't have much power, but it will do 4-ohms - might do well with my speakers). Note the nice spiked feet. This is looking like a better and better deal given how expensive stuff costs up there - assuming the sonics pan out (and I have no reason to suspect that they will not given hints to the amps topology). Hopefully UltraSonic Studios will hold off from drastic price increases a la Feliks if and the brand gets more recognition. There is a large fan underneath the amp which is suspended to the bottom plate with rubber mounts like PC fans. I'm not totally sure if this is necessary, but it was probably put there out of an overabundance of caution.
AFTER (for kewl people)